package thread;
class Counter{
    private static int count;

    public void add() {
        synchronized(this){
            count++;
        }
    }

    public int get() {
        return count;
    }
}
public class Demo14 {
    public static void main(String[] args) throws InterruptedException {
        Counter counter = new Counter();
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 5000; i++) {
                synchronized(counter){
                    counter.add();
                }
            }
        });
        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 5000; i++) {
                synchronized(counter){
                    counter.add();
                }
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(counter.get());
    }
}
